limit on editing posts

15. Don't necro old threads without adding something new to it. Necroing is acceptable ONLY if you have something interesting or new to add. Necroing with a *bump* or *grave dig* is unacceptable and will result in either the deletion of the necroed thread or will result in its locking.

Hi.... I dont really understand this meant but is there a limit in editing a post I created a thread post but it aint old yet and it doesn't let me edit it anymore...... well I was going to edit and post some more to the content but doesnt let me now........